"Only this time the request was effectively for unwarranted access to everything" Yes it was. Access to everything _for that user_. Which they are explicitly a

"Only this time the request was effectively for unwarranted access to everything" Yes it was. Access to everything _for that user_. Which they are explicitly allowed to request with a warrant (which they had) under US law. Just because Lavabit could not provide the information for that user without giving away everyone eles's information does not mean that the government can't have the information for that one user.